SCIENTIFIC POSTER SESSION171SCIENTIFIC POSTER SESSIONWednesday, 23 February 2011, 16:30 – 18:00,foyerPosters are listed in alphabetical order of the firstauthor. Unless otherwise stated, the first author isthe person who will present the poster during thesession.Wednesday | 16:30 | FoyerStatus and future of tropical biodiversity | Frankfurt, 21 - 24 February 2011gtö
172 SCIENTIFIC POSTER SESSION | FOYERSCIENTIFIC POSTER SESSION | FOYER173Topic: East African mountain <strong>for</strong>ests: functional ecology andsustainable managementTopic: African savannas biodiversity - past, present, futureREHABILITATION OF DEGRADED NATURAL FORESTS BYENRICHMENT PLANTING OF FOUR NATIVE SPECIES INETHIOPIAN HIGHLANDSAbebe G 1 , El Kateb H 1 , Fetene M 1 , Reinhard Mosandl 1MODELLING SPATIAL PATTERNS OF SAVANNAS IN CENTRALAFRICAN REPUBLICJulie Aleman 11Technische Univ. München, Freising, DE, mosandl@<strong>for</strong>st.tu-muenchen.de1Université Montpellier II, MONTPELLIER, FR, julie.aleman@univ-montp2.frWEDNESDAY | FOYERPresenter: Reinhard MosandlIn the Munessa-Shashemene Forest in Ethiopia the survival, growthand photosynthetic per<strong>for</strong>mance of enrichment planting of fourspecies (Cordia africana, Juniperus procera, Prunus africana, andPodocarpus falcatus) was investigated. Planting was undertaken ingaps in the degraded natural <strong>for</strong>est. Two years after planting, only23% of the C. africana and P. africana seedlings had survived, whileJ. procera and P. falcatus showed higher survival rates of 76% and47%, respectively. The development of the height over the first twoyearobservation period was reasonable <strong>for</strong> J. procera and P. falcatus.Inadequate height development was registered <strong>for</strong> P. africana, whichwas strongly affected by browsing and <strong>for</strong> C. Africana, which sufferedfrom drought. P. falcatus exhibited the lowest photosynthesis andtranspiration rates, which were associated with the highest wateruse efficiency of all the four species. Enrichment planting especiallywith J. procera and P. falcatus can be recommended to restore thedegraded natural <strong>for</strong>ests.Savannas are biomes where trees and grasses co-dominate. Woody cover isa determinant variable to define savanna type. Factors that determine therelative proportions of trees and grasses across the various savanna typesare still under debate. Because savannas are one of the most sensitiveecosystems to future global changes, and known to have been so during theHolocene, we stress the need of a better understanding of the relationshipsbetween woody cover and those factors.The aim of this study is to determine the functional relationships and therelative importance of several <strong>for</strong>cing factors (precipitation, soil propertiesand fire) in the distribution of woody cover in Central African savannas.We used remote sensed data to determine the dependence of woody cover,expressed in LAI derived from MODIS product, to annual precipitation(Meteosat), soil properties (FAO data) and fire regimes (MODIS Burned Areaproduct) using a statistical model.Spatial modeling of vegetation will enable us to describe the functionalrelationships between woody cover, environmental <strong>for</strong>cing andanthropogenic pressure.Moreover, applying this statistical model will enable us to predict vegetationchanges over various scenario of climate and anthropogenic changes.Wednesday WEDNESDAY 16:00 | FOYER | Foyergtö<strong>Society</strong> <strong>for</strong> <strong>Tropical</strong> <strong>Ecology</strong> | Gesellschaft für Tropenökologie e.V. Status and future of tropical biodiversity | Frankfurt, 21 - 24 February 2011gtö
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